A few years back Telus eliminated the multiview feature - I used it, but really didn't like the interface.
What I would like to see instead is just a simple picture in picture feature where you could display one additional channel in a small screen, similar to what you see when you are browsing the Guide. There could be a button for enabling the PIP, which would always display the previous channel. Press the button again to disable the PIP. When you select Prev on the remote, the main and PIP displays would exchange channels. Alternately, there would be a way to enable/disable the PIP and control what channel it displays.